Description

There're two integers A and B, where B is the reverse number of A.

For example, B is 4321 if A=1234.

Please calculate the sum of A and B.

Input

A is a integer (0 < A < 10^9)

Output

Output A+B

Note that you need to print ‘\n’ at the end of the output.

Sample Input  Download

Sample Output  Download

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